Horn for loud speakers



Oct. 23, 1928. 1,689,009

s. H. BYRNS HORN FOR LOUD PEAKERSV Filed Aug. 15. 1927 a P-s f? .4 J5] y16 15 [6 I I N VEN TOR. Y JHE /IWS,

ATTORNEY.

Patented Get. 23, 1923.

STEPHEN H. BYRNS, OF KANSAS CITY, MISSOURI.

HORN FOR LOUD SPEAKERS.

Application filed August 15, 1927. Serial No. 213,824.

The present invention relates to loud speaker devices, and aims toprovide "a novel and improved form of speaker adapted to be used inconnection with. loud speaker units, such as those of the radio type,the improved construction being of a nature adapted to produce a moreaccurate and clearer amplification of the sound as transmitted from theloud speaker unit.

In carrying out my invention, I have devised a horn constructionentirely ofwood material and comprising one or more horn members orpassages adapted to be fitted with loud speaker units, and includingalso a sound board element or partition within the horn chamber, wherebya fuller and clearer transmission and amplification of the sound areattained.

With this general object in view, the invention will now be described byreference to the accompanying drawing illustrating a form ofconstruction designed to embody the invention, after which thosefeatures and combinations deemed to be novel will be particularly setforth and claimed.

In the drawing Figure 1 is a perspective view showing a hornconstruction embodying the invention;

Figure 2 is a longitudinal sectional view, representing a section on theline II-II of Figure 3;

Figure 3 is a longitudinal section taken on the line III- II of Figure2; and

Figure 1 is a transverse section taken on the line IVIV of Figure 3.

Referring now to the drawing in detail, this illustrates my improvedconstruction as comprising a hollow casing or shell constructed entirelyof wood material, such as spruce or other suitable wood fiber material,this shell or casing being of substantially rectangular form at its head5, below which the body portion of the horn tapers gradually downward atits front 6 and sides 7 to the base 8, the back 9 of said body portionlying in the same vertical plane as the baclr of the head portion 5, asshown in Figure 3. The base portion 8 is provided with a foot piece orblock 10 at each of the bottom corners.

Inside the body portion of the horn is an upwardly tapered partitionstructure comprising a pair of wood partition members 11 convergingupward from the bottom corners, thus forming a pair of upwardly flar inghorn passages or chambers 12, to which receiving opening-s 1.4; areprovided at bottom corners through the blocks 10 and base 8 and leadinginto the lower ends of said pasand extending parallel to the back 9 andterminating slightly above the lower end of the chamber or passage 12,just short of the corresponding receiving opening 14. Near its lower endeach of the sides 7 is provided with a vent opening 17 and the back 9 isalso provided with a vent opening 18 into the lower end of each of thehorn passages or chambers 12.

Within the space inside the head 5 is arranged an oblique wood partition19, extending upwardly and forwardly over the outlets from the hornpassages or chambers 12, in position to direct the sound out through themain outlet opening 20 of the device, forming the front side of the head5, as illustrated in Figures 1 and 2.

The structure above described is designed to be mounted by any suitablesuspension means within a cabinet (not shown) with the outlet opening 20registering in communication with a similar, and preferably screened,opening in the front face of the cabinet. Preferably also the suspensionof the horn structure within the cabinet is effected by as few points ofconnection with the interior of the cabinet as possible in order topermit full freedom of vibration of the horn structure in reproducing,transmitting and amplifying the sound, in conjunction with the loudspeaker units. These loud speaker units are not illustrated, but aredesigned to be con nected with the openings or passages 14 at the lowerend of the horn chambers or passages 12, in any convenient or preferredmanner. With this construction, being entirely a of wood material, andhaving the vent openings 17 and 18 for allowing the free circulation ofair through the horn passages, and including the sound board elements orpartitions 15, I find that I am able to secure perfectly pure, cleartones and in full volumes, approaching ractically ideal reproduction ofthetransmitted sounds in every wayu I While I have illustrated describedWhat I now regard as the preferred mode of embodiment of myimprovements, I desire to reserve the right to make all such changes ormodifications which may fairly fall Within the scope of the appendedclaim.

Having thus described my invention, What I claim and desire to secure byLetters Pa tent is A horn construction for loud speakers comprising acasing constructed entirely of Wood material and having a partitionstructure dilviding said casing into a pair of tapered horn chambershaving receiving openings for loud speaker units, asheet of relativelythin Wood material mounted longitudinally Within each of said hornchambers in spaced relation to the front and rear Walls thereof, and anoutlet compartment communicating with the outer or discharge ends ofboth of said horn chambers.

In Witness whereof I hereunto afiix my signature.

STEPHEN I-I. BYRNS.

